Bklyn3

On 21/01/2024 at 19:18, stringvelocity said:

Do you have any programmable switches?

Not sure what you mean exactly. All of them are hooked to a teensy 4.1 that maps each of them to different functions based on the page. 

On 17/01/2024 at 07:16, Gottastopbuyinggear said:

That does indeed look really good!

 

Can I ask where you sourced the footswitches, or rather the coloured surrounds if they're separate from the switch?

I used those https://guitarpedalparts.com/products/led-foot-switch-ring-red-blue?variant=34878770938009&currency=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gad_source=1&gclid=CjwKCAiAxaCvBhBaEiwAvsLmWLOFVszIC6x9xGQhBPdm5GQCpSke6koclw0TgzPfrOuVqBMCZLZcKhoC8gQQAvD_BwE

Finally finished this project. 
Thanks Stoo for the idea. 
I added a feature to control YouTube which is super useful when practicing. 
 

Hello All,

I am upgrading my version of this pedal with several .96 OLED screens and I was wondering if anyone has a way to retrieve the names and settings of a preset by reading it from the HX Stomp directly. Either via MIDI or USB (similar to what HX Edit does). 
currently I hard coded them but that’s ideal. 
 

Thank you 

P. 

Hi Stoo,

according to this post, the 3.3V shouldn’t be an issue for MIDI. Just need to change the resistor. 
https://forum.arduino.cc/t/midi-5v-and-3-3-volt/521595

I will give it a shot and report how it goes. 
 

P. 

Hello all, 

I was thinking about adding one buttons on the foot switch to control YouTube (play/pause using the keyboard shortcut k). 
For that I would need to emulate a Bluetooth keyboard in addition to the MIDI command send to the HX via cable. 
Has anyone attempted to do so? 
(I know I could achieve the same  with the Command Center on the HX but I would then lose one of the FS 1 to FS5. Also if it works I plan on also controlling GB ) 

can anyone recommend a way to code that with a nano 33 BLE ?

thank you 

P. 
 

Hello all, 

Does anyone know if there is a MIDI CC code to mimic pushing the  view button ?

Hi Stoo,

After struggling for a few days I finally found some issue with the grounding. All works well.

Thanks so much for your original post.  

P. 

Stoo,

You read my mind, I was just doing some testing using a MIDI monitor. For some reason the signal is not sent properly to the Stomp. Nothing in the command center.
See the image below showing the results for the 3 first button on page 1. I looks like I get only 61 and even a Chan 8 request ???

I start wondering if maybe something wrong with the Adruino. Considering getting a Mega and try. Any recommendation on the model?

After restarting all from scratch I was able to have the Adruino communicating with the Stomp. Unfortunately it is still not working properly . Using the original code version 1 posted by Stood with only a quick adaptation to use a SH 1106 OLED, the code produces the right screen behavior and I am able to navigate the different pages. However the buttons are not doing was they are supposed to do   For instance , on page 1 button 6 is supposed to turn on the stomp mode  (case 0 case 5 sendControlChange(71,0,1)) but in my case, it toggles between my preset 000 and 063 😕. I pushing the right switch as the screen reverse the color correctly. Something fishy still to be found but I guess that’s part of  the DYI fun. 
 

pat.  

Hello Stoo, 

No luck with the code.

Here is the code I am using 

#include <MIDI.h>
#include "U8glib.h"


//Initialize display.
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_DEV_0);
const int midiSendChannel = 1; // MIDI channel for outbound messages

// Creates and binds the MIDI interface to the default hardware Serial port 
MIDI_CREATE_DEFAULT_INSTANCE(); 
void setup() { 
  MIDI.begin(MIDI_CHANNEL_OMNI); // Listen to all incoming messages
  //Set font.
  u8g.setFont(u8g_font_unifont);
} // end of setup 

void loop() {
  MIDI.sendControlChange(71,1,midiSendChannel); //Scroll Mode 
  u8g.firstPage();
  do {
       u8g.drawStr(20, 40,"Sending 71 1");
    } while (u8g.nextPage());
  
  delay(500);
  
  MIDI.sendControlChange(49,0,midiSendChannel); //FS1 
  delay(500);
} // end of loop

Same as the one you provided with the addition of a u8g command to make sure I reach the MIDI sent instruction. 

For the MIDI connector, I connected the Tx on the second pin on the left (brown on the attached images). My soldering skill sucks but I checked  the continuity of the MIDI cable and do get the 4.7V at the other end of my MIDI but still nothing happening with the Stomp (MIDI connected to the IN ).

I also try with my old POD 2.0 but not working either. To make sure it is not an issue with the Stomp itself, I tried to send a MIDI signal via a keyboard and it worked. I wonder if maybe something wrong with the Tx pin of my Adruino? Is there a way to check that ?

One thing I noticed is that when I try to upload the code from my Mac to the Adruino with the MIDI connected to the Stomp, I get the following error message. Sound like my Mac doesn't like to have the MIDI plugged. 

The upload works properly if I first unplugged the midi cable before the upload. 

Arduino: 1.8.13 (Mac OS X), Board: "Arduino Nano, ATmega328P (Old Bootloader)"

Sketch uses 10966 bytes (35%) of program storage space. Maximum is 30720 bytes.
Global variables use 634 bytes (30%) of dynamic memory, leaving 1414 bytes for local variables. Maximum is 2048 bytes.
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -carduino -P/dev/cu.usbserial-1430 -b57600 -D -Uflash:w:/var/folders/y8/hmh6g2sx1b9b4dyp6h7bqbp00000gn/T/arduino_build_595367/MidiTest.ino.hex:i 

avrdude: Version 6.3-20190619
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf"
         User configuration file is "/Users/Patrick/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port                    : /dev/cu.usbserial-1430
         Using Programmer              : arduino
         Overriding Baud Rate          : 57600
         AVR Part                      : ATmega328P
         Chip Erase delay              : 9000 us
         PAGEL                         : PD7
         BS2                           : PC2
         RESET disposition             : dedicated
         RETRY pulse                   : SCK
         serial program mode           : yes
         parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         ByteDelay                     : 0
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :

                                  Block Poll               Page                       Polled
           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           eeprom        65    20     4    0 no       1024    4      0  3600  3600 0xff 0xff
           flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
           lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           lock           0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
           calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
           signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

         Programmer Type : Arduino
         Description     : Arduino
         Hardware Version: 2
         Firmware Version: 1.16

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x00

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xce

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x30

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x06

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x00
         Vtarget         : 3275.2 V
         Varef           : 4.0 V
         Oscillator      : 0.001 Hz
         SCK period      : 35553.4 us


avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xde

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x30
avrdude: stk500_initialize(): (a) protocol error, expect=0x14, resp=0x02
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.

avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x00

avrdude done.  Thank you.

the selected serial port 
 does not exist or your board is not connected


This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

Hi There ,

started the project this afternoon but somehow the hx doesn’t respond. The code goes to the right MIDI send statement  but nothing is changing. Is there something to set on the HX stomp side ? The voltage I got is not 5 v on the MIDI plug but 4.7v. Could that be an issue? 
 

thanks. 
 

pat. 

2 minutes ago, stoo said:

If this is your first Arduino project, then I'd suggest - unless you're reasonably confident on the programming side of things - that you stick to either using an SSD1306 OLED with a Nano, or bump up & use a Mega if you want the Nextion screen. You can easily leave out the expression pedal input part if that's of no interest to you, and the price difference between Nano and Mega is only about £10 for the Chinese clones if you're on a really tight budget....

 

Hi Stoo,

Thanks a lot for the advise. I think you are right; for my first Adruino project, it is more reasonable to try your original design and improve from there.

Pat. 

Hello Stoo,

I recently purchased a HX Stomp and I plan on building your MIDI controller. Thanks so much for sharing your design with the world. 

This will be my first Adruino project, so hopefully the learning curve won't be too steep.

A quick question, could you please send the reference of the bigger screen. Will the Adruino Nano (posted 2 years ago with the list of items) work with the bigger screen or do I need something else? 

Thank you